Gas-blowpipe.



N. GOODYEAR.

GAS BLOWPIPE. APPLICATION IIL ED AUG.7, 1909.

Patented Feb.'28, 1911.

i Z W M V. Q 4 J6 mv f BY Q @mmam To all it may concern:

, in which two gases such before they issue from NELSON soonxnan, or NEWYOBK,'N. Y.,'- assmnon ro MAINE DEVELOPMENT CORPORATION, A CORPORATIONOF MAINE.

cas-nnowr rn.

Specification of Letters Patent. I

Patented Feb. 28, 1911.

Application filed @ugust 7, 1909. Serial No. 511,822.

Be it known that I, NELSON GOODYEAR, a citizen of the United States, anda resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Gas-Blowpipes, of which thefollowing is a specification accompanied by drawings. 7

This invention relates more particularly to'the head 01' nozzle portionof blow pipes, as'acetylene and oxygen are burned, and means for easilycontrolling the mixture of the gases used the. outer orifice of thenozzle.

The invention also relates to the improved means for adapting a blowpipe of a given size to'use different nozzles ofva rious sizes andforms, forhaving separate blow pipes for each size or shape of flamethatis required for use in brazing or autogenous welding operations.

. Referring to the drawings, Figure l is a longitudinal cross sectionalone form of the invention; Fig. 2 is a top plan view of Fig. 1; Fig. 3is aside elevation of the parts shown in Figs. 1 and. 2 mounted in asuitable handle; and Fig. 4 is a longitudinal cross sectional view ofanother form embodying certain features of the invention.

' Referring to Fig. 1', A is the inlet for one of the gases used and Bis the inlet for the other. It is preferable that the gas which is underthe higher pressure should enter at A, as for example when oxygen andacetylene are used it is customary to have the oxygen under a higherpressure than the acetylene and in such a case A' would be the oxygeninlet. l

The gas isled tot-he inlets A and B by suitable shown at C and D in Fig.3, which may be of flexible metallic tubing, adjustment of the head E ofthe blow pipe at various angles'with reference to the handle F.Referring again to thevarious figures, the head E is adapted to receiveand support by means of the screw thread Ga is of great importance tohave the gases doing away with the necessity.

view through portion of the b gas pipe connections or conduits as so asto permit an piece H embodying a throat I and'a mixingchamber J. Thepiece '11 is in turn ada. ted

thoroughly mixed in a suitable chamber as shown at J before the issuefrom the nozzle-- metal operated on with a neutral or reduclng flameavoiding in most cases any tendcncy to oxidation. In order to attain theproper mixture of the two gases, the one which is'under the higherressure enters through the inlet A throng the passages clearly shown inthe drawings to the nipple L, which has a converging orifice Mprojecting well into the throat'I which constitutes the entrance to themixing chamber J. The converging orifice M is provided with a needlevalve N, which fing box 0, so that the needle valve may be controlledreadily by means of the knurled head'P, a portion of the needle valvebeing provided with a screw threadQwhich engages in a correspondingthrezkd R in some ow pipe rig dly fixed in relation to the nipple L.Thev gas which is under the lower prexure enters through the inlet B andpasses throu 11 the various passages clearly shown to t the nipple Landenters the throat I through the annular space between the outwardlytapered end of the nipple L, and converging wall T formed in the piece Hwhich leads into the throat I. It is desirable.to have one of the gasesenter the mlxmg chamber J through the throat I at a greater velocitythan the other gas, in order that eddies may be formed in the mixinggases and effectually mingle them into a homogeneous mixture before theyleave the orifice in the nozzle. K. I

It is usual in blow ipes for the purposes herein described and whichhave interchan eable nozzles corresponding to the'nozzle I ofv varioussizes, to be providedwith mixin chambers of greater or lessefii'ciencyand a so with separate inlets to the mixing chamber for the two gasescorrespond ng to the outlet orifice of the ni ple L and to the annularorifice U and in su blow p1 es it is necessary or desirable that the ,orces also there would be danger of passes through a stufe space S aroundcorresponding to. the outlet orifice of the nipple 'L and the orifice Ube interchange" may correspond 1n able also, so that the properproportion wit the orifice 1n the mthenozzle-K; This is acconi mg notonly the outer, nozz e-interchangewith terchan geable nozzle, h

is e s y avableg'but by having separate detachable .noz-

zles' or orifices corresponding to the out-let.

of thenipple N or by having the piece H of various slzes', each carryingits mixing chain-- ber, outer nozzle and inlet nozzle corresponding tothe outlet of the nipple L. In the former case the operator has theinconven-' ience of changing several small par't's', which "not onlytakes some little time but error is likely to be made in getting theproper cor-- responding sizes right. Inthe latter case dle valveN andifd'esired, by varying gthe 2 there is the difiiculty of joining in oneoper- .atf'ion, in a gas tight manner; the connections size of theannular orifice U by changing the as'providedjby the thread W,

flat, thetime compress cal rt-ion M of the-nipple {L with relat'ion to te=converging wal Tleadin tothe throat 1. This may beaccomplishedin '1',2 and '3 bymeans efthe adjasting'wheel "V or in the formshowninFigdbyfthe back or forward movement-of the piece-" H in the formshown-in Figs; 1- and, 2 the nipple L is adapted to slide ack-and .forththrouiglh thehead' E which is provided with a stu ng box X-, the glandofwhich is pressedby the spring Z. ,The interposed] between the gland Iring Z is 1 and the collara', which is securely fastened to the nippleL;so that the springZ tendsto. push the nippleL forward into the throat" Iand the packing "in into an ei'rterii'ally, threade freej regimes 'iIi-ahollow c in the head E. The saternaiihreadef the piece 1) engagesthestuiii'n lick-X, flhehi l'e L is'screwed g 4 PP ,piece b whic h. is-

, A fisintlie thrbad iii the wheel V so that by turning thewheely the Lmaybe moved backward or forward against 01 with the spring Z,.'tl1usvarying the orifice U.

. 1151;- he r m shown-m ragga adjusting" ifithread is provided with locknuts d; an

washer efor the purpose of preventing. an-

v-escape of ga's'through the thread Wand for the purpose of lockintherelative adj-11stmentbetween th nip e L aiidthe piece H .r to varythe ori c'e- I been'found unnecessary to ange the -orifices for bothgases where they enter the throat I whenchangin the outer-nozzle K. a

It. is only desirable t-oc ange the orifice carpressure. he other maybeleft open wide enough at all times-to supply the la! est sized nozzleKemployed. It will there ore be understood that if desired the needlevalve N-may :be opened up wide provided gases have been arranged axiallyin a man: ner somewhat similar to that shown inthe accompanying drawingsbut with "the i n portantd1fierence that the needle valve admitting thehigh pressure gas; does not have its variable" pr-lficei atthe-point-ofj-discharge into the throat of the mixing chamber. "Theadvantage of having the high p'i'esslue gas discharge orifioeclose totheentrance of the relative adj ustmentbe'tween the outer conimix-ingchamber; is forthepurpose'bf deri-r? ging the fli'll'j benefit-"of "thevelocity which 'is greatest at the point'of restriction of the f' valve;lt will befnoticed in theiacco mpan .ith e mjix ing chamber are tapereda very gradual way-for: the deliveryend of the .-head' of. the blow pipeat any desired ans In 'racti'ce it has;

as which is under the higher- ?so that the momentum of gases whichtravel at considerablevelocities tends to carry them forward into the'mixing cha m ber and obviates any tendency 'tob'ack be more or less thecase'were t ie' entrances "to the throat I not nearly coincident'in ldi+rection with the axis-02E the blow ipe.

In a blow pipe like that herein s 1 own the fwhichare carried fina-forkh--branc iiig fron1' a cylindric'al handle F,- one of the vbranches ofthe fork H is provided with a the pin'j being threaded where it passesthumb nut 'k' tort-he purpose'of fixing lie with reference 'to thehandle F. In or er that the head maybe movable with reference' to thehandle without breaking the connection, the latter-are made fleiiibleeither in the sense of being flexible-hose as be made-by swing oints mthe trunnions similar to swing joints in ordinary gas brackets, in whichcase the gasesjwould be brought'to the .trunnions by making the two armsof the fork h tubular. Th s adpipe is of great convenience'and thereareso many Ways for accomplishing the dcsired end that it seemsunnecessaryto sh'ow ow sa that the currentof the gases is as nearlyasmay be alongman axial line, v

shown in the drawing at C D,;or they may been designed for use inconnection with acetylene and air, the valves for the two ping drawihthe orificesdelivering "t e .two gases-" i;i itoi the'throat I orentrance-to v z-or obstruct the flow of-the other, as as won" head ismounted on-trunnion screws Q'g' circular slotdthrough which a pin"travels,

l through the slot-{i and adapted tocarry a. t e

justa'ble' feature. of the head of the blow i cii them since the methodof using. flexible hose connections adequately establishes the inventionin this particular.

In Figs. 1, 2 and 3 the outer nozzle K is shownadapted to be clampedagainst the piece I by means of a ring 11?. and toggle joint 92-, 0 thepart 0 having a thumb piece 79 for convenience in manipulation. Thenozzles K fit with the ground joint over the outer conical portion ofthe piece l. Any discrepancy in the exactinterchangeability of thenozzles K being compensated by the spring in the links a of the togglen, 0. Referring to Fig. 3 g is an extension piece for the handle F whichis tubular and telescopes over the handle I so that the handle as awhole may be varied in length to suit conditions on varying classes ofwork.

It will be understood that the embodiment of the invention herein shownis only one of many which may be devised and I do not limit my claims tothe particular structure ordescribed.

I claim and desire to obtain by Letters Patent the following:

1. In a gas blow pipe the combination of a chambered head having gasinlet orifices, a nipple and needle valve therein, a throat piececonnected to said head and provided with a contracted portion, and amixing chamber, the point of conflux of the gases being in saidcontracted portion, and means for removably connecting a nozzle to saidthroat piece comprising a iece Z having a conical surface, and meansorclamping the nozzle against the piece Z.

A gas blow pipe having a nipple for one of the gases, a needle valve forcontrolling the nipple, a mixing chamber and a throat, gas connectionsfor the other gas leading to said throat, and means for adjusting thesaid nipple longitudinally including a spring acting thereon in one'direction.

3. A gas blow pipe having a nipple for one of the gases,

a needle valve for controlarrangement of parts herein ling the nipple, amixing chamber and a throat, gas connections for the other gas leadingto said throat, and means for adjusting the said nipple longitudinallyincluding a spring acting thereon in one direction and a stufling boxaround said nipple upon which the said spring acts compressively.

4. A gas blow pipe having a nipple for one of the gases, a needle valvefor controlling the nipple, a mixing chamber and a throat, gasconnections for the other gas leading to said throat, and means foradjusting the said nipple longitudinally i11- cluding a spring actingthereon in one direction and av screw mechanism for moving it inopposition to said sprin A gas blow pipe having a mixing chamber, gasinlet connections, and means for regulating the volume of gases, anozzle, and means for securing nozzles interchangeably to the blow pipecomprising a ring for receiving'andholding the nozzle, a seat or surfacefitted to receive the nozzle, and a toggle joint connection for drawingthe ring and nozzle against the said surface.

6. A. gas blow pipe having a head, a gas mixing chamber, a nozzle,inlets for the gases to be mixed. a handle having a fork and pivotalconnections between the said head and the fork, gas connectionsextending from the handle to thesaid inlets.

7. A gas blow pipe having a head, a gas mixing chamber, a nozzle, inletsfor the gases. to be mixed a handle having a fork and pivotalconnections between the said head and the fork and means for securingthe pivotal connection at various positions of adjustment.

I11 testimony whereof I have signed this specification in the presenceof two, subscribing witnesses, August 3rd 1909.

NELSON GOODYEAR.

\Vitnesses:

E. VAN ZANDT, E. P. LA GAY.

